Honestly after I finish the 150g(no clue when), I want to set up a fish room and keep as many catfish as I can get although I did make a tank size limit of 75g max with one 100g as an exception for maybe a lungfish. Basically I’m really ambitiousWhen I started at age 8 in 1958, color television hadn't become a thing yet.
And I agree about as expensive or less it is, by the time you enter college, you could spend 4 years tuition on fish stuff, and in an apartment, or dorm, you may not be allowed any tank larger than a 50.gal.
You may want to start out a little less dramatic to get your feet wet, and gain experience instead of ordering some of the species you crave at the moment.
I like the idea of a crayfish in a 29 .